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In rock mechanics, several methods to define brittle rock materials were as follows.
First, the rock materials damaged when it reached or exceeded lightly the yield strength.
Thirdly, the materials fractured with little or no plastic flow.
It was hard to describe exactly the brittle failure process of rock materials.
The brittleness is not only deformation characteristics but also materials characteristics.

The study of the electric erosion phenomenon of contact materials is significant to improve its service life and reliability[1-5].
In recent years, many researchers have been interested in the study of arc erosion, surface morphologies and material transfer phenomenon of noble metal alloy contact materials[6-9].
In order to study the arc erosion mechanism, the surface morphologies, microstructures and material transfer phenomenon of Pt-Ir-Zr alloy contact materials were carried out by electrical contact test machine and SEM in present paper.
Acknowledgment This work was financially supported by the Science and Technology Innovation Team of Kunming (2012-01-01-A-R-07-0005), Innovation Team of Yunnan Province(2012HC027) and the Province and University Science and Technology Cooperation Project of Yunnan Province(2012IB002).
Corresponding Author Saibei Wang, 77481311@163.com, 86-871-8328841 or +86 1580 886 3053  References [1] Wei Chen, Yi Zhen: Precious Metals No.33 (2012), p. 3 [2] Miaonong Chen: Electrical Materials No.2 (2005), p. 38 [3] Leung C L, Lee A: IEEE Transactions on Components, Hybrids, and Manufacturing Technology Vol. 14 No.1 (1991), p.101 [4] Choi Y S, Kim D L, Kim M S, et al: IEEE Transactions on Applied Superconductivity Vol. 21 No. 3 (2011) , p.1050 [5] Chi H L, Anthony L: IEEE Transactions on Components, Hybrids, and Manufacturing Technology Vol. 15 No. 2 (1992), p.146 [6] FRÉDÉRIC PONS, MOHAMMED CHERKAOUI, IDRISS ILALI and SERGE DOMINIAKE: Journal of ELECTRONIC MATERIALS Vol. 39 No. 4 (2010), p.456 [7] Rong M Z, Zhao Z Y, Yang W: Low Voltage Apparatus No. 5 (1998), p.1 [8] Deng Z M, Lu Y Shi A, et al: The Chinese Journal of Nonferrous Metals Vol. 11 No. 2 (2010), p.144 [9] Fangfang Liu: Precious Metals Vol. 28 No. 3 (2007), p.24 [10] Jing Li: Low Voltage Apparatus No.9 (

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Materials and Methods Experimental Materials Sample: As a sample, corncob with gelatinous membrane was picked up from vinegar trickling tower in WeiChunYuan Food Limited Liability Company, Guiyang, Guiyang City, Guizhou Province.
Chandra: Journal of Industrial Microbiology.
[10] Xiangjun Qi, Jinxia Gou, Yanan Di and Hua Zhang: Journal of Cellulose Science and Technology.
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Thermographic determination methodology: Application on fatigue limit of AL 2024 for R=-1 Stanislav Seitl1,a, Jan Klusák1,b, Pelayo Fernández2,c, Alfonso Canteli 2,d 1Academy of Sciences of the Czech Republic, v. v. i., Institute of Physics of Materials, Brno, Czech Republic 2 Department of Construction and Manufacturing Engineering, University of Oviedo, Spain aseitl@ipm.cz, bklusak@ipm.cz, cfernandezpelayo@uniovi.es, dafc@uniovi.es Keywords: Thermographic methodology, Al 2024, stress ratio, statistical evaluation.
Introduction On basis of thermal experimental data, some analysis methods have been developed over the years in order to correlate the growing temperature to the physical processes of damage and failure in materials [1-4].
The thermographic method has been applied to different materials (steel, Al alloy [5], and fiberglass) and to some simple components (notched specimens, butt welded joints).
Part I and Part II, International Journal of Fatigue, 1986, VIII, pp. 29-38, ISSN: 0142-1123 [2] LA ROSA, G., RISITANO, A., Thermographic methodology for rapid determination of the fatigue limit of materials and mechanical components, International Journal of Fatigue, 2000, XXII, pp. 65-73, ISSN: 0142-1123 [3] LA ROSA, G., RISITANO, A.
Thermographic methodology of the fatigue limit of materials and mechanical components, International Journal of Fatigue, 2000, XXII, pp. 65-73 ISSN: ISSN: 0142-1123 [4] FERNÁNDEZ-CANTELI, A., CASTILLO, E., ARGÜELLES, A., FERNÁNDEZ, P., CANALES, M., Checking the fatigue limit from thermographic techniques by means of a probabilistic model of the epsilon–N field, International Journal of Fatigue, (2012) XXXIX, pp. 109–115, ISSN: ISSN: 0142-1123 [5] Pastor, M.L., Balandraud, X., Grédiac, M., Robert, J.L.

The material microstructure plays a pivotal role in dictating the modes of fracture and the macroscopic responses of real materials.
Materials.
The Corrosion of Regenerator Materials.
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In addition, small metallic ions are also used as addictive materials [4-6] to increase the internal conductivity of the LiFePO4 samples.
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Effect of Cerium on Microstructure and Wearing Resistance of 5CrMnMo Hot Working Die Steel Xin Hao 1, 2, a, Meiling Pan1, b and Xiaofei Liu 1,c 1College of materials science and engineering, Inner Mongolia University of technology,Inner Mongolia, Huhot 010051,China；2Key Laboratory of Materials Processing﹠Control Engineering of Inner Mongolia Autonomous Region, Inner Mongolia University of Technology, Inner Mongolia ,Huhot, 010051 ahaoxin2008@163.com, b953588576@qq.com, cliuxiaof@126.com Keywords: Cerium, 5CrMnMo, Structure, Worn-out Appearance, Wearing Resistance, Rare Earths Abstract.
During wear procedure, high plasticity material may make some bond wearing so that the wear effects are reduced [11].
Effect of rare earth elements on growth dynamics in 60crmnmo steel [J].Journal of rare earths, 1999, 17(1):46
Experimental Research on the Anti-wear Properties of the Steel NM360 [J].Journal of Wuhan University of Technology (transportation science and engineering), 2006, 30(3):395 [9] Hu Zhenqian, Zhang Wenhua.Effect of rare earths on the wear resistance and high temperature oxidation resistance of H13 steel surface treated with S N C Co diffusion [J].Journal of rare earths, 1998, 16(3):13
Effect of RENb on the strength and toughness of 3cr2moniwv cast hot working die steel [J].Journal of materials science, 2006, 32(7):4185

The studies on composite process of aluminum foam and solid materials and its bonding interface are still of great significance so far.
Experimental method Experimental materials.
[2] J.Banhart: Progress in Materials Science, Vol.46 (2001), p.559
[4] B.Levine: Advanced Engneering Materials, Vol.9 ( 2008),p.788
[16] Liang Xiaojun, Zhu Yonggang, Chen Feng: Journal of Science and Engineering.

First, the structure and material were all linear.
(4) The influence of material nonlinearity was evident.
[4] Han Lin-hai, Tao Zhong, Liu Wei: submitted to Journal of Fuzhou University(Natural Sciences Edition) (2001)
[5] Zhang Xin-jun, Sun Bing-nan and Xiang Hai-fan: submitted to Journal of Zhejiang University Science A (2005)
[6] Zhang Jiang-min, Zhen Jie-lian and Qin Rong: submitted to Journal of Highway and Transportation Research and Development (2002).